My iPhone flashlight won't turn off

So I have a iPhone 4 and my flashlight is not turning off. Even if I restart and power it off. Please Help!
I can't take it to school with the flashlight on! That'd be awkward!

No! NOT AWKWARD! NO!@! 1…

Double tap the home button, find the app, hold your finger on it, click the little "x" that appears to close it.

Do what chicken man said, double-tap the home button to open appswitcher, hold on one app to get jiggle mode, and tap on the minus for the app that uses flashlight.